Building units and construction elements – Prefabricated unit – Closure
Patent
1980-08-22
1982-08-24
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
D25 52, D25 72, D25 87, D2502
Patent
active
D02659336
REFERENCES:
patent: 1604459 (1926-10-01), Lyons
patent: 3420730 (1969-01-01), Ellefson
patent: 3512304 (1970-05-01), Meuret
American Standard Inc.
Crooks Robert G.
Salerno, Jr. James J.
Sinnott John P.
Word A. Hugo
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